Activate after reinstalling or moving Office

Office Home & Business, Office Home & Student, and Office Professional can be installed on a single computer. If you try to install and activate these versions of Office on a different computer (owned by you or someone else), or on the same computer after a hardware change, you might see an error message that you have reached the maximum number of activations.

Note: If you own multiple one-time purchases of Office and are having trouble activating subsequent Office installs, see Change your Office product key.

If you follow the transfer terms in the Software License Terms, you can move Office to a different computer, but you must activate it by phone and then uninstall Office from the original computer.